Paper-folding machine



Dec. 13, 1927.

G. A. SHAFFER ET AL PAPER FOLDING MACHINE Filed Jan. 7. 1927 3Sheets-Sheet 1 I N VEN TORS v A TTORNEYS G. A. SHAFFER ET AL PAPERFOLDING MACHINE 3 Sheets-Sheet 2 Dec. 13, 1927.

Filed Jan. '7, 1927 III'HUWHHHWHIIM INVENTORS W 9 O ATTORNEY Dec. 13,1927. 1,652,417

' G. A. SHAFFER ET AL PAPER FOLDING MACHINE Filed Jan. 7, 19, sSheets-Sheet 5 A TTORNE Y Patented Dec. 13, 1927.

UNITED' STATES p i,652,41? PATENT OFFICE.

GLENN A. smmrnn AND FRANKLIN H. mm, or GREEN BAY, WISCONSIN, AS-

SIGNORS TO roar HOWARD Mirna COMPANY, or GREEN BAY, wIscoNsIN, A coreIPOIRA'JJION OF WISCONSIN.

PAPER-FOLDRJ'G MACHINE.

Application filed. January 7, 1927. Serial No. 159,578.

The invention relates to paper folding machines and has as an object.the provision of a machine adapted to fold paper double and to fold theedges of the thus folded strip upon the center thereof to provide afourfold strip having the free edges of the double fold lying adjacentthe center of the strip and to then cut the strip into len hs and foldthe several lengths in the midd e to provide a folded napkin forpackaging.

By further action of the machine, the thus folded sheets are fed to achute from which they may be removed for packaging.

It is a further object of the machine to provide an attachment for aknown machine to produce the final fold above referred to.

Further objects will appear from the following description when read inconnection with the accompanying drawings showing an illustrativeembodiment of the invention wherein: Fig. 1 is a side elevation of "themachine broken away to shorten its length;

Fig. 2 is a vertical transverse section on line 22 of Fig. 1;

Fig. 3 is a detail plan view' of the attachment; and

Figs. 4, 5, and 6 are detail transverse secis shown, the device isapplied to a known form of machine for folding paper and in practice themachine really embodies two machines in one having supply rolls forpaper to be operated upon shown at 10 and 11. For purposes ofillustration but one attachment is shown in'the present drawings. V

In the known form of machine the paper is ledfrom supply roll 10 to aV-shaped folding late 12 which doubles the paper in the wel -knownmanner and from which plate in the known .machine the paper is leddownward between the rolls 13, 14, which rolls crease the thus foldedpaper which is then led between the cutting rolls 15, 16, which latterroll bears knife 17 adapted to enter recess 18 in the roll 15 wherebythe folded paper is cut into lengths, which lengths are ided betweenrolls 19, 20, and are operate upon by a tucker 21, which is given areciprocating motion and which tucker strikes the lengths at theircenter to force the same between ribbons 22, 23 which tions on thecorresponding section lines of' carry the finally folded paper downwardto be fed to a chute 24 by means of the plunger 25. I i

The mechanism for driving the parts thus described being well known isnot illustrated in detail. The result of this known machine is paperfolded into quarters.

According to the present invention the strip of doubled paper deliveredby the plate 12 is carried to one side about the roller 26 against whichthe paper is creased by means of roller 27 and is carried about a shoe28 shown in cross section in Figs. 4 and 5.

The edges of the doubled sheet as shown in Fig. 5 are turned upwardlyand are folded over upon the upper portion of the shoe 28 as shown inFig. 6. The shoe 28 is supported upon a rib 29 from the supporting rod30 of Fig. 2.

To press the edges of the paper down upon the shoe 28, there are shownrollers 31, 32, carried by stub shafts 33, 34, which'shafts are mountedupon links 35, 36, mounted upon rod 37.

From the shoe 28 the paper is led over the roll 39 thence downwardly andunder a roll 40 from which the folded paper passes to the roll 14between which roll and roll 13 the strip is pressed to crease the folds.The paper is then cut into lengths by the cutting rolls 15, 16, and isagain folded in the middle by action of tucker 21 and is then finallyfed to the chute 24 from which the paper may be removed in desiredquantities for packaging.

For purposes of illustration of the invention the rolls 31, 32 are eachshown as formed of a disk 41 having a rabbeted edge at 42 for receptionof an annular ring 43 of rubber or the like, said disk mounted on aheaded sleeve 45, and a disk 44 having screw threaded engagement withsleeve 45 and re taining the .ring 43 in place. The thus formed rollersare mounted on the headed spur shafts 33, 34 mounted in blocks 46,carried by links 35, 36 and retained between the two members-of eachlink as by bolts 47;

To support the roll 39 and the rods 30, 37 there are shown arms 48, 49mounted upon the side members 50, 51 of the machine as by means ofblocks 52, 53.

The operation of the device will be clear from the above description.

Minor changes may be made in the physi cal embodiment of the inventionWithin the scope of the appended claims Without departing from thespirit thereof.

W's claim:

1. A paper folding machine comprising in combination, means for doublinga strip of paper, a shoe, means for leading the central portion of saiddoubled strip against one side of said shoe, means for pressing theedges of said strip against the opposite surface of said shoe With saidedges adjacent the central portion thereof, means for conducting thestrip from said shoe to a cutting derice for severing the folded stripinto lengths.

2. A paper folding machine comprising in combination, a V plate fordoubling a strip of paper, a shoe located laterally of said V plate,means for leading the central portion of said doubled strip against oneside of said shod-means for confining the edges of the strip deliveredfrom the V' upon the upper surface of said shoe, means for con ductingthe strip from said shoe to a cutting device for severing the foldedstrip into lengths.

3. A paper folding machine comprising in combination, a V plate fordoubling a strip of paper, a shoe located laterally of said plate, meansfor conducting said strip with its central portion in contact with oneside of said shoe, means for confining the edges of said strip againstthe opposite side of said shoe, means for creasing the thus folded stripand means for severing the folded strip into lengths.

at. A paper folding machine comprising in combination, a V plate fordoubling a strip of paper, a shoe located laterally of said plate, meansfor conducting said strip with its central portion in contact with oneside of said shoe, means for confinin the edges of said strip againstthe opposite side of said shoe, means for creasing the thus foldedstrip, means for severing the folded strip into lengths and means foragain folding said strips transversely of their length.

5. A paper folding machine comprising in combination, a V plate fordoubling a sheet of paper, a shoe located laterally of said V plate,means for leading said folded strip in contact with one surface of saidshoe, means for confining the edges of said strip against the oppositesurface of said shoe.

said edges being adjacent the central portion thereof, means forcreasing the thus folded strip, means for cutting the folded and creasedstrip into lengths and means for delivering said lengths to a chute.

6. 'A paper folding machine comprising in combination. a V plate fordoubling a sheet of paper, a shoe located laterally of said V plate,means for leading said folded strip in contact with one surface of saidshoe, means for confining the edges of slild strip against the oppositesurface of said shoe, said edges being adjacent the central portionthereof, means for creasing the thus folded strip, means for cutting thefolded and creased strip into lengths, means for folding said striptransversely thereof adjacent their central portions and means fordelivering said lengths to a chute.

7. A paper folding machine comprising in combination, a V plate fordoubling a strip of paper, a shoe located laterally of said Vi plate,means for conducting said strip with the central portion in contact withone surface of said shoe, means comprising rollers for pressing theedges of said strip against the opposite surface of said shoe andadjacent the central portion thereof, means for creasing the thus foldedstrip, means for cutting the strip into lengths and means for feedingsaid lengths to a chute.

8. A paper folding machine comprising in combination, a V plate fordoubling a strip of paper, a shoe located laterally of said V plate,means for conducting said strip with the central portion in contact withone surface of said shoe, means com rising rollers for pressing theedges of said strip against the opposite surface of said shoe andadjacent the central portion thereof, means for creasing the thus foldedstrip, means for cutting the strip into lengths, means for folding saidlengths transversely thereof adjacent their central portion and meansfor feeding said lengths to a chute.

9. An attachment for folding machines comprising, in combination, a rib,a shoe mounted adjacent its central portion on said rib, a pair ofrollers mounted to press the edges of a strip of material against saidshoe on each side of said rib while the central portion of said strip isin contact with the opposite surface of said shoe.

10. An attachment for folding machines comprising, in combination, abar, a rib mounted'on said bar, a shoe mounted ad: jacent its centralportion on said rib, a rollor so mounted on said bar at each side ofsaid rib as to press the edges of a strip of material against one sideof said shoe at each side of said rib While the central portion of saidstrip is in contact with the opposite side of said shoe.

11. An attachment for folding machines comprising, in combination, apair of brackets adapted to be mounted on the frame of the machine. aroller mounted between said brackets adjacent each end thereof, a barmounted. between said brackets intermediate the ends thereof, a ribmounted on said bar, a shoe carried by its central portion on said rib.a link pivotally mounted on said bar at each side of said rib, a rollerrevolubly carried by the free end of each of said links in position topress one of the edges of a strip of material against the surface ofsaid shoe at each side'of said rib while said strip is led about saidrollers with its central portihon in contact with the opposite side ofsaid s oe.

12. An attachment for folding machines comprising, in combination, apair of brackets adapted to be mounted on the frame of the machine, aroller mounted between said brackets adjacent each end thereof, a

bar mounted between said brackets intermediate the ends thereof, a ribmounted on said bar, a shoe carried by its central portion on said barin a plane removed from a plane passing tangent to the effectiveBortions' of the clrcumferenoes of said. ro ers' whereby to causea stripto be folded to. press against said shoe, 'ineans to press the edges ofa strip carried about said rollersagainst one side of said shoe whileits central portion is in contact with the opposite side thereof.

- GLENN A. SHAFFER.

FRANKLIN H. WIRTZ

